电镀镍金板生产中金面变色改善分析

摘要

ENIG is widely used in PCB surface treatment process. Discoloration problem usually appears in gold surface of ENIG. Gold is a stable element, theoretically the oxidation will not happen spontaneously. This paper analyzes 3 factors which cause the gold discoloration. This paper studies on the key production process steps to analyze the causes of discoloration.%PCB电镀镍金生产过程中有时会发生金面变色的问题，金是稳定的金属元素，理论上金的氧化并非自发，分析认为出现三种情况会导致金面变色。本篇将从导致变色的生产流程重要环节上加以探讨分析。